94.01: Starting from rest, object 1 falls freely for 4.0 seconds, and obx*o3wz 4(l s;os 8 densrct8*yject 2 falls freely for 8.0 seconds. Compared to object 1, obje o oe8ztw8;3*ny*4s(ssdlr cxct 2 falls:

  94.02: A car starts from rest and uniformly accelerates to a final speed of t;pvb:l3wov q6m*q*)cp eh 8,sr cbp:20.0 m/s iw* :8vr ceb6plc qpvbpt;:sqm3)o,h*n a time of 15.0 s. How far does the car travel during this time?

  94.03: A ball is thrown off a high cliff with no horizontal velocity. It lands 6gm h-v7-pf1ex.0 s later with a velocifhpveg- 71 m-xty of 40 m/s. What was the initial velocity of the ball?

  95.27: A rocket near the surface of the earth is accelerating verti:35j b5azh 9; e-vmx pr:yrrbfcally upward at 9fbxzjrvr:e -:53; hmaybp 5r$10\;m/s^2$. The rocket releases an instrument package. Immediately after release the acceleration of the instrument package is:

  95.13: A freely falling body is found to be moving downwards at 27 m/s at one i :a y;xong, ++0zmqhwi xt8g7jnstant. If it continues to fall, one second later the object would be moving with a;z gmx : jxtoi0ga+7q, +nh8yw downward velocity closest to:

  95.39: A car starts from rest ando ffi1ivgv4 ,9 accelerates at $0.80\;m/s^2$ for 10 s. It then continues at constant velocity. Twenty seconds (20 s) after it began to move, the car has:

  96.17: A ball which is dropped from the top of a building strikes the ground, ;u op-q.nkoh with aok-o.;, nq uhp speed of 30 m/s. Assume air resistance can be ignored. The height of the building is approximately:

  97.09: At a certain time, an object in free fr ;mhbcde u5 hop:)2:mall has velocity 4.0 m/s in the upward direction. What is the approxibhuh ::cm2m)eo pd5r ;mate velocity of the object one second later?

  98.14: How long must abe el9:nitqo*(rp 2k, $2.5\;m/s^2$ acceleration act to change the velocity of a 2.0 kg object by 3.0 m/s?

  98.15: A freely falling object is found to be moving downward at 18 m/s. If ite2j soxu -+ sv8r(dgdolk- l:j3yjt./ co2 -srj:yk/38xevl.dg (j o-d+ousjtl ntinues to fall, two seconds later the object would be moving with a speed of

  17.02: A small object is released from rest and falls f9*i bn3bqu;r treely for 4.00 s until reaching the ground. What was the height above the ground from which the objb9n ;tub *3riqect was released?

  11.06: A ball of mass =0.100 kg is launched straight upward so that it fj:s-h inh xokuw7:+.rises to a maximum height of 12.0 m above the launch point. Ignore air resistance. When the ball reaches i x-s+h:nhk:jo 7uf .iwts maximum height, which one of the following choices best represents the magnitude of the net force acting on the ball?
D 10.0 N
E 12.0 N

  11.07: A ball of mass =0.100 kg ;o2(g3 x.ty eshbr w*otya9a, is launched straight upward so that it rises to a maximum height of 12.0 m above the launch point. Ignore air resistance. Approximately how much time does it take the ball thr. a 3yax;wote9osg*y ,2(bto reach the maximum height from its launch?

  98.31: An object sliding down an incline m3a3p6kd/lfod plane has speed 0.40 m/s two seconds after it begins to slide. Approximately ho63ldo fkam3p/w far does it travel in three seconds?

  98.40: Coin I is thrown upward from the top of a 100-m tower with a speed of ev) ve hb)gv,,kssix+s2 .ti;15 m/s. Coin II is dropped (zero initial speed) from the top of the to.et +iv,vsish)2gse kv , )x;bwer 2.0 s later. Assume g is $10 \; m/s^2$. How far below the top of the tower does coin I pass coin II?

  02.04: If a ball is thrown directly upwae mw9ig5f f( gp ld.1vu34be;xrds with twice the initial speed of another, how much higher will it be at itsw4dg(fg m31p.u5 e lv;9fixeb apex?

  02.30: A box falls to the ground from a deliverykb im pxk.ullcrv4 2mxz;3dp)t0/0 a3 truck traveling at 30 m/s. After hitting the )/k bmi 3rd0pm.; ck3pavt0lx2xlz u4 road, it slides 45 meters to rest. How long does it take the box to come to rest?

  03.29: An object is thrown upwards with yrhsd2;2rv kb;p+u4ka velocity of 30 m/s near the surface of the earth. After two seconds what would be the d;vbk 24y+r ;dhrsup 2kirection of the displacement, velocity and acceleration?
displacement velocity acceleration

  04.10: Three stones of different mass (1m, 2m& 3m) are thrown vertically h+f1(v9evwgkb.*ot c upward with different velocities (1v, 2v& 3v respectively). The diagram indicates the mass and velociw v*9b1v ec fo+.h(ktgty of each stone. Rank from high to low the maximum height of each stone. Assume air resistance is negligible.

  10.25: Two point objects are launched straight upward with identical linear mfl++nl1 v e.bmomentum. Object 1 has mass M and reaches a maximum height H above the launch point. If object 2 has mass 2M, what is its maximum attained height a1m +eb+fn.vll bove the launch point in terms of H ?

  04.28: A rubber ball bounces on the ground as shown. After -eiwd;4 ,rw pnu42oa;8qxb nf each bounce, the ball reac; f a;4,pwinxq8ron 42ebu-d whes one-half the height of the bounce before it. If the time the ball was in the air between the first and second bounce was 1 second, what would be the time between the second and third bounce?

  16.21: At 1.94 s after launch, a projectile in free fall achip s1:ii4* hokieved its minimum speed during flight. If that minimum speed was 15.0 m/s, what was the projectile’s initial angle of launch fromii:pio ksh4* 1 the horizontal?

  05.02: A pebble is dropped from a3bl,f kgbw;sl 1 2f/sj6jbm plw2- 0dz high vertical cliff. The collision of the pebble with the ground below is seen 1.50 seconds after the pebble is dropped. With what speed di/zj3sfspl w06lw2k 2; gm- ,bfdbbl1jd the pebble hit the ground? Ignore air resistance.

  06.03: Three students were arguing abq+e;zd z w+ 0jq0jofa9out the height of a parking garage. One student suggested to 0 z+d9+jq ejqfw;za0hat to determine the height of the garage, they simply had to drop tennis balls from the top and time the fall of the tennis balls. If the time for the ball to fall was 1.4 seconds, approximately how tall is the parking garage?

  05.07: A snail is moving alon1ubbb 8(hjpu:g a straight line. Its initial position is x0 = -5 meters and it is moving away from the origin and slowing down. In this coordinate system, the signs of the initial position 18(phbub bj:u, initial velocity and acceleration, respectively, are

  04.38: A small point-like object is pulled downwards by gravity (down the plan kff/ahsw,i+ 20iif) ae of the page) but is constrained to exactly follow each of the frictionless pathways shown. Rank these three paths from shortest to longest in terms of the amount of time (T) necessary for the object to be released from rest at point A and travel to point B. Assume that in changing direction that there is no loss of energy and that it ta/iaaki sh)w+,i0 ff 2fkes negligible time.

  06.13: A rock is dropped from the top of a tall tower. Half a second later anot1;1ht trz1 x gaw.p(egher ro1pgxwha ;z 1gt.ter (1ck, twice as massive as the first, is dropped. Ignoring air resistance,

  06.18: A cart is initially moving mb*t k2:1hu oxat 0.5 m/s along a track. The cart comes to rest after traveling 1 m. The experiment is repeated on the same track, but now the cart is initially moving at 1 m/s. How far does the cart travel before coming to rb 2m*ktuh:xo 1est?

  07.11: A cart is initially mo(9fk6qmu d4 maving at 0.5 m/s along a track. The cart comes to rest after traveling 1 m. The experiment is repeated on the same track, but now the cart is initially moving at 1 m/s. How far does the cart travel before coming to rest?kmm9dq4a 6fu(

  08.03: A dog starts from rest and runs in a straight line with a cp2c9bz7go-mzf 7wt ai505 govonstant accelera59o7 matb5cizf-zw opvg 7 0g2tion of 2$.5\;m/s^2$. How much time does it take for the dog to run a distance of $10\;m$?

  10.29: A ball initially at rest falls without air re8o y 7 ;lyis/c)nw-raa8fmy3 csistance from a height h abovefw)- r3o/88 y y7yila; scnmac the ground. If the ball falls the first distance 0.5h in a time t, how much time is required to fall the remaining distance of 0.5h?

  10.38: Two objects both move and w xuql-73 nj;otk,(gyuniformly accelerate to the right. At time t=0,the objects are at the same initial position. Object 1 has initial speed twice that of Object 2; Object 1 has one-half the accelerat yk xj;,7oqulw(g-3 ntion of Object 2. After some time T, the velocity of the two objects is the same. What is the ratio of the distance traveled in this time T by Object 2 to that traveled by Object 1?

  12.26: An object is thrown horizontally with speedcp i 3ic)4wj-pdnde9r 2.x 9a,b kzx3v 10.0 m/s from a height H above the ground. The object reaches the ground with a speed of 20.0 m/s. Which one of the following choices best represents the time of the object’s flight to the ground? p3j.cp2v9i r4)k- 3 b w9eaiddx,zcnx Ignore air resistance.

  13.10: An object is thrown straight up;c a31j)jgj xdward. The object remains in free fall until it returns to its initial launch point. Which one of the following graphs could represent the veloci3)xjcaj;gd1 j ty of the object as a function of time during its flight?

  14.03: An object is dropped into free fall. Through how many meters doesru j fo9vszj0n r3tj0p a4*o25 the objectrn4t*2aozjj u3 5 vjo9pr 00sf fall during the first 3.00 seconds of flight?

  15.02: A box uniformly slides 7.50 m to rest across a ffvo f *53ck3szywy*z 6lat surface in a time of 12.0 s. What was5fyw*3 f6vzyc3zs o*k the initial speed of the box when it started its slide?

  14.07: Starting from rest, a cart uniformly accelerates to a speed of rnli/1zwo/21 rv x5c uvh0 3rx7.60 m/s in a time of 3.00 s. Through what distance does the cart m 0urr 5h1//2 v1n rxcoixwlv3zove in this time?

  14.16: A toy car initially moves to the righr4:mglw-c0 ex t at 60.0 cm/s. Five seconds later, the car is moving at 40.0 cm/s to the left. The total displacement of the car during this time is 10.0 cm to thx0-e4 l: rcwmge left of where it started. Which one of the following choices best represents the magnitude of the average velocity of the car during the five second motion?

  14.17: A toy car initially moves to2,lukpkm ud+3w :s6a d the right at 60.0 cm/s. Five seconds later, the car is moving at 40.0 cm/s to the left. The total displacement of the car during this time is 10.0 cm to the left of where it started. Which one+skm:dl6wu2u3 a d,p k of the following choices best represents the magnitude of the average acceleration of the car during the five second motion?

  14.33: An object moves with constant acceleration starting with velaw*h v,d*48nuitkhqdex jd+r0z b/f 1:ont)*ocity $v_0 = 5.00\;m/s$ and ending with a velocity of $v = -1.00\;m/s$ in a time of 3.00 s. For this motion, what is the average speed associated with the object?

  15.05: An object initially is moving upward while inek /agg6hqyse fpn+4 1-yk0+e free fall. Which one of the following choices best represents the direction of the object’s acceleration during its flngs4 qyk0kfe /g6a pe++h e-y1ight?

  13.26: An object moving only to the right completes a 20.0 second trip in ty 0l2nncx :/xxrutj;, wo stages, I and II. The average speed of the entire trip is 10.0 m/s. For stage I, the object moves with a constant velocity of 6.0 m/s for 12.0 seconds. Wl2/cnt x,u0j:nx ; yxrhat constant acceleration must the object have during the 8.0 seconds of stage II?

  15.32: An object moving along a line completes a 20.0 second trip with ankdzm2/o / )bmr average speed of 10.0 m/s in two stages. During stage 1, the object moves with a constant velocity of 6.0 m/s to the right for 12.0 seconds. What constant magnitude acceleration directed to the left must the object have during the 8.0 /mmbk/)dz2 orseconds of stage 2?

  13.33: At the top of a high cliff, a small rd vxey8wh v,o.oz) r)2ock is dropped from rest. A ball is launched straight downward with an initial speed of 36 m/s at a time 2.10 s after the rock was dropped. When the ball has fallen 28.0 m further than the initially dropped rock, what ie,zovo dx. y)hr )w8v2s the speed of the ball relative to the rock?

  16.36: On a straight road, a self-driving car races with a robot. The robot -+y/h )4vqf9ypxwm uvaccelera9pv)vf+qyhy 4x- wm u/tes at $8.50\;m/s^2$ until reaching its maximum constant speed of 15.0 m/s. The car accelerates at $5.60\;m/s^2$ until reaching its maximum constant speed of 25.0 m/s. The car and robot start from rest from the same location. What is the maximum distance that the robot leads the car during the race?

  17.44: A ball is launched vertically upward. The vertical positi(qn3xy ;* 7skw sg5a,a yrqz8won of the ball 0.70 s afterwx87qnsa ;sg5 ,*( awqk 3zyyr release is the same as its vertical position 4.10 s after its release. At what time is the object first at a vertical position that is one-half of the maximum height it obtains during its flight?